原子中的八秒角线条和道时间
U Satya Sainadh1, Han Xu2, Xiaoshan Wang3
1Australian Attosecond Science facility, Centre for Quantum Dynamics, Griffith University, Nathan, Queensland, Australia.
Nature
|March 20, 2019
概括
量子道是瞬间发生的, 而不是在障碍物下度过的有限时间. 对原子的实验证实了这一点,
科学领域:
- 量子力学
- 原子物理
- 量子光学
背景情况:
- 量子道是一种粒子穿过潜在障碍的现象,
- 关于量子粒子是否花费可测量的时间进行道化存在争议,
- 由于其简单性,原子可以作为精确测量和计算的基准.
研究的目的:
- 通过先进的技术来实验原子中的量子道化时间.
- 将实验结果与精确的理论模拟进行比较.
- 解决关于量子道是瞬间的还是需要有限的时间的争论.
主要方法:
- 采用阿托秒角条纹 (attoclock) 技术进行精确的电子释放时间.
- 使用动量空间成像进行详细的电子轨迹分析.
- 对原子进行实验,并将数据与3D依赖时间的施罗丁格方程模拟进行比较.
主要成果:
- 在实验测量和原子理论模拟之间发现了很好的一致性.
- 库伦电位被确定为电子发射角度的原因,而不是有限的道时间.
- 任何道延迟的上限为1.8阿托秒.
结论:
- 量子道穿过潜在的障碍是一个瞬间的过程.
- 测量角度的解释是有限的道时间是不正确的.
- 这项研究提供了强有力的证据,
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